Arizona, California, Nevada, Utah
Area codes
10
Rate centres
71
Carriers
68
Prefix blocks
17,902
A Local Access and Transport Area is the region a call is routed within before it becomes long-haul. The boundaries were drawn when the Bell System was broken up in 1984: a local carrier could carry a call inside its LATA, and a long-distance carrier had to take it across one. The division still shapes how calls are routed and rated today, which is why every prefix block on this site carries a LATA.
68 carriers hold blocks here. The 25 largest are shown.
| Carrier | OCN | Blocks | Share |
|---|---|---|---|
| T-MOBILE USA, INC. | 6529 | 2,923 | 16.3% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | 2,619 | 14.6% |
| QWEST CORPORATION | 9636 | 2,246 | 12.5% |
| ONVOY, LLC - AZ | 630E | 2,242 | 12.5% |
| NEW CINGULAR WIRELESS PCS, LLC | 6010 | 1,719 | 9.6% |
| BANDWIDTH.COM CLEC, LLC - AZ | 587F | 777 | 4.3% |
| LEVEL 3 COMMUNICATIONS, LLC - AZ | 3285 | 765 | 4.3% |
| COMCAST IP PHONE, LLC | 318J | 686 | 3.8% |
| METROPCS, INC. | 5562 | 685 | 3.8% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | 580 | 3.2% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | 558 | 3.1% |
| ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 7175 | 273 | 1.5% |
| PEERLESS NETWORK OF ARIZONA, LLC - AZ | 579F | 270 | 1.5% |
| ONVOY SPECTRUM, LLC | 624H | 252 | 1.4% |
| TELNYX LLC | 073H | 117 | 0.7% |
| LEVEL 3 TELECOM OF ARIZONA, LLC - AZ | 7552 | 108 | 0.6% |
| PAETEC ITEL, LLC | 829J | 103 | 0.6% |
| CITIZENS TELECOM CO OF WHITE MOUNTAINS INC. | 4426 | 81 | 0.5% |
| CITIZENS UTILITIES RURAL DBA FRONTIER UT RURAL | 2172 | 76 | 0.4% |
| COMMIO, LLC | 939H | 70 | 0.4% |
| CENTURYLINK COMMUNICATIONS, LLC | 508J | 68 | 0.4% |
| TERRA NOVA TELECOM INC. | 145J | 66 | 0.4% |
| FRACTEL, LLC | 965H | 62 | 0.3% |
| CSC VOICE, LLC | 612K | 57 | 0.3% |
| BOOST SUBSCRIBERCO L.L.C. | 490J | 43 | 0.2% |
71 rate centres. search them all.